WO2014017056A1 - 車載機器制御システム - Google Patents
車載機器制御システム Download PDFInfo
- Publication number
- WO2014017056A1 WO2014017056A1 PCT/JP2013/004393 JP2013004393W WO2014017056A1 WO 2014017056 A1 WO2014017056 A1 WO 2014017056A1 JP 2013004393 W JP2013004393 W JP 2013004393W WO 2014017056 A1 WO2014017056 A1 WO 2014017056A1
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- WO
- WIPO (PCT)
- Prior art keywords
- signal
- vehicle
- determination
- portable device
- received
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
- G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
Definitions
- This disclosure relates to a vehicle-mounted device control system including a portable device possessed by a user and a vehicle-mounted device that controls the vehicle-mounted device by communicating with the portable device.
- the engine can be started or stopped by pressing the engine switch just by wearing a legitimate portable device so that a comparison is made between the portable device owned by the user and the vehicle-mounted device mounted on the vehicle.
- a smart entry system that performs locking or unlocking of a vehicle door by touching a vehicle door switch has been put into practical use (see, for example, Patent Document 1).
- the transmission antennas provided at a plurality of locations on the vehicle, such as the driver's seat side, the passenger seat side, and the outside of the trunk room, and the vehicle-mounted device are connected via a wire harness. It is the composition which becomes.
- the wire harness between an onboard equipment and a certain transmission antenna may pick up the electromagnetic wave which leaks from the wire harness between onboard equipment and another transmission antenna.
- the radio wave leaks from another transmission antenna of the vehicle. If there is such a radio wave leakage, the following phenomenon occurs according to the study of the present inventor.
- an ID request signal is transmitted from the transmission antenna 41L, and radio waves of the same strength are transmitted from the transmission antennas 41L and 41R separately from the ID request signal.
- the portable device ID is returned, the electric field strengths of the two radio waves are measured, and the measurement data of these two electric field strengths are also returned.
- the portable device 20 is present on the side where the electric field intensity is measured more strongly among the two radio waves (that is, the portable owner 31 is present). If it is on the right side of the vehicle, it is determined that the owner of the portable device has operated the switch 41R, and the door 42R on the right side of the vehicle 20 is unlocked if the portable device ID is matched with the vehicle ID. .
- the portable device 20 transmits radio waves transmitted from the transmission antennas 41L and 41R. Since it is necessary to measure the electric field strengths of the two and return the measurement data of these two electric field strengths, the response time becomes long.
- the present disclosure has been made in view of the above, and aims to prevent erroneous detection that the portable device is present in the regular area even though the portable device is present in the non-regular area while shortening the response time. To do.
- an in-vehicle device control system determines whether a portable device is present in a regular area by communication between the portable device possessed by the user and the portable device,
- a vehicle-mounted device control system including a vehicle-mounted device that controls a vehicle-mounted device according to the determination result, and is configured as follows.
- the on-vehicle device includes a request signal sending unit that sends a request signal from a specific transmission antenna mounted on the vehicle to a portable device that exists in a regular area around the vehicle, and a portable device that exists in a non-regular area around the vehicle.
- a determination signal transmission unit that transmits a determination signal from a transmission antenna other than the specific transmission antenna that transmitted the request signal.
- the portable device responds to the request signal so as to include a received signal strength measurement unit that measures the received signal strength of the determination signal and received signal strength information indicating the received signal strength of the determination signal when the request signal is received.
- a response signal generation unit that generates a response signal and transmits the response signal to the vehicle-mounted device. The vehicle-mounted device determines whether or not the reception strength of the determination signal is greater than a specified value based on the reception signal strength information included in the response signal and the reception determination unit that determines whether or not the response signal has been received.
- the portable device is irregular An in-vehicle device control unit that controls the in-vehicle device as existing in the area.
- the vehicle-mounted device causes a request signal to be transmitted from a specific transmission antenna mounted on the vehicle to the portable device existing in the regular area around the vehicle, and exists in the non-regular area around the vehicle.
- the portable device measures the reception signal strength of the determination signal and receives the request signal
- the portable device transmits the determination signal from another transmission antenna other than the specific transmission antenna that transmitted the request signal.
- the response signal is generated in response to the request signal so as to include the received signal strength information indicating the received signal strength of the determination signal, and the response signal is transmitted to the on-vehicle device. And determining whether or not the reception strength of the determination signal is greater than a specified value based on the received signal strength information included in the response signal.
- the mobile device controls the in-vehicle device as being present in the non-regular area. While shortening the time, it can be prevented that the portable device is erroneously detected as being present in the regular area even though the portable device is present in the non-regular area.
- the regular area is, for example, a touch operation when a sensor that detects a touch operation on a door for unlocking a vehicle door detects a touch operation on one of a plurality of doors of the vehicle. A predetermined area around the door.
- the non-regular area refers to, for example, a predetermined area around a door other than the one door that is touched among the plurality of doors.
- the specific transmission antenna refers to, for example, an antenna corresponding to the touch-operated one door, for example, a transmission antenna located near the touch-operated one door.
- the transmission antenna other than the specific transmission antenna refers to, for example, an antenna corresponding to a door other than the touched door, for example, an antenna located in the vicinity of the door other than the touched door. .
- FIG. 1 is a diagram illustrating a configuration of an in-vehicle device control system according to an embodiment of the present disclosure.
- FIG. 2 is a diagram illustrating a communication format between the vehicle-mounted device and the portable device.
- FIG. 3 is a flowchart of the vehicle-side control unit of the in-vehicle device control system according to the first embodiment.
- FIG. 4 is a diagram for explaining a regular area and a non-regular area.
- FIG. 5 is a flowchart of the portable device control unit of the in-vehicle device control system according to the first embodiment.
- FIG. 6 is a flowchart of the vehicle-side control unit of the in-vehicle device control system according to the second embodiment.
- FIG. 7 is a diagram for explaining the related art.
- FIG. 1 The configuration of the in-vehicle device control system according to the first embodiment of the present disclosure is shown in FIG.
- This in-vehicle device control system determines whether or not the portable device 20 exists in a regular area through communication between the portable device 20 possessed by the user and the portable device 20, and the in-vehicle device according to the determination result. It is comprised by the onboard equipment 10 which performs control.
- This in-vehicle device control system performs unlocking of a vehicle door and starting of a vehicle drive device (for example, an engine).
- a request signal of LF (low frequency) band is transmitted from the vehicle-mounted device 10 to the portable device 20, and a response signal of RF (radio frequency) band is transmitted from the portable device 20 to the vehicle-mounted device 10. Is done.
- the LF band communication distance will be described.
- communication in the RF band communication is performed in the region of the radiated electromagnetic field even in the case of communication at a short distance due to the short wavelength, but in the case of wireless communication in the LF band at a short distance such as a smart system.
- Has a very long wavelength compared to the communication distance and communication is performed in the area of the induction electromagnetic field.
- the distance attenuation in the RF band attenuates in inverse proportion to the square of the distance, whereas the distance attenuation in the LF band attenuates in inverse proportion to the cube of the distance. For this reason, the communication in the LF band can be limited to a specific area.
- the vehicle-mounted device 10 includes an LF transmitter 11, an RF receiver 12, and a controller 13.
- the LF transmission unit 11 is connected to the LF transmission antenna 2a provided in the center pillar on the driver's seat side and the LF transmission antenna 2b provided in the center pillar on the passenger side, and the RF reception unit.
- the RF receiving antenna 3 is connected to 12.
- the sensor 6 and the actuator 7 are connected to the control unit 13.
- the LF transmission antennas 2a and 2b are antennas for wirelessly transmitting LF waveband signals (LF radio waves).
- the LF transmission unit 11 modulates the LF data signal output from the control unit 13 into an LF waveband signal and outputs the signal to the LF transmission antennas 2a and 2b.
- the RF receiving antenna 3 is an antenna for wirelessly receiving an RF waveband signal (RF radio wave).
- the RF receiving unit 12 demodulates the signal of the RF wave band received by the RF receiving antenna 3 and outputs it to the control unit 13 as a signal of RF data.
- the sensor 6 is a sensor that is attached to a door handle portion of a vehicle door, detects a user's operation of placing a hand on the door, and outputs a detection result to the control unit 13, and is realized as a touch sensor, for example. Is possible.
- the actuator 7 is an actuator that is a target of smart drive, and includes a starter motor of a vehicle engine (or an engine ECU that controls the starter motor), a door lock mechanism that locks and unlocks the door of the vehicle (controls the door lock mechanism). Door ECU).
- the control unit 13 performs smart driving based on communication with the portable device 20 by exchanging signals with the LF transmission unit 11, the RF reception unit 12, the sensor 6, and the actuator 7.
- the vehicle-side control unit 13 includes a central processing unit (CPU) and random-access RAM (RAM). memory), ROM (read only memory), a microcomputer equipped with I / O (input / output), etc., and the CPU executes various programs recorded in the ROM, so that the RAM can be used as a work area. Realize the process. Below, the process which CPU performs is described as a process of the vehicle side control part 13. FIG.
- the portable device 20 includes an LF reception antenna 21, an LF reception unit 22, an RF transmission antenna 24, an RF output unit 25, and a portable side control unit 26.
- the LF reception antenna 21 is an antenna for receiving an LF waveband signal transmitted from the vehicle-mounted device 10.
- the LF receiving unit 22 is a circuit that demodulates the signal of the LF wave band received by the LF receiving antenna 21 and outputs the demodulated signal to the portable side control unit 26 as a signal of LF data.
- the LF receiving unit 22 includes an RSSI measuring unit 22 a that measures the received signal strength of the signal in the LF wave band received by the LF receiving antenna 21.
- the RSSI (reception signal strength) measurement unit 22a measures the reception signal strength of the determination signal and receives the determination signal.
- the RSSI reception data representing the signal strength is output to the portable control unit 26.
- the RF transmission antenna 24 is an antenna for wirelessly transmitting an RF waveband signal (RF radio wave).
- the RF output unit 25 is a circuit that modulates an RF data signal output from the portable control unit 26 into an RF waveband signal and outputs the signal to the RF transmission antenna 24.
- the portable side control unit 26 is realized as a microcomputer including a CPU, a RAM, a ROM, an I / O, and the like.
- a CPU executes a program recorded in the ROM
- various processes are performed using the RAM as a work area. Is realized.
- processing executed by the CPU will be described as processing of the portable control unit 26.
- a request signal (ID request signal) is transmitted from the in-vehicle device 10 to the regular area, and separately from this request signal, a determination signal (burst signal) is transmitted from the non-regular area, A response signal responding to the request signal is transmitted from the portable device 20 so as to include the RSSI reception data representing the reception signal strength of the determination signal, and the vehicle-mounted device 10 receives the received signal strength of the burst signal specified by the RSSI reception data. Is equal to or greater than the reference value, the in-vehicle device is controlled assuming that the portable device 20 exists in the radio wave leakage area.
- FIG. 2 shows a communication format between the vehicle-mounted device 10 and the portable device 20.
- the request signal is a signal transmitted from the vehicle-mounted device 10 to the regular area
- the burst signal is a signal transmitted from the vehicle-mounted device 10 to the non-regular area.
- the response signal is a signal sent from the portable device 20 in response to receiving the request signal.
- the burst signal is composed of an RSSI burst “ON” and an RSSI burst “OFF”.
- the RSSI burst “ON” period is continuously at a high level for a certain period, and the RSSI burst “OFF” period is continuously at a low level.
- the response signal includes RSSI “ON” and RSSI “OFF”.
- the received signal strength information indicating the received signal strength measured by the RSSI measuring unit 22a during the RSSI burst “ON” period of the burst signal is set in the RSSI “ON”, and the RSSI “OFF” is set in the RSSI “OFF”.
- Received signal strength information indicating the received signal strength measured by the RSSI measuring unit 22a during the burst “OFF” period is set.
- the burst signal is specified so that transmission starts after a certain period from the end of the request signal.
- the response signal is defined so that transmission is started after a predetermined period from the tail end of the burst signal.
- FIG. 3 shows a flowchart of the vehicle-side control unit 13 of the in-vehicle device control system when the user touches the sensor 6 in order to unlock the vehicle door.
- FIG. 5 shows a flowchart of the portable device control unit 26.
- the portable device side control unit 26 periodically performs the process shown in FIG. Further, when the touch operation of the user is detected by the sensor 6, the vehicle-side control unit 13 performs the process shown in FIG.
- a case where a user's touch operation is detected by the sensor 6 provided on the passenger seat side of the vehicle will be described as an example.
- a request signal (ID request signal) is transmitted from a specific transmitting antenna 2b mounted on a vehicle to a portable device existing in a regular area around the vehicle (S100).
- the passenger seat side of the vehicle is a regular area, and a portable antenna present in the regular area is connected to a transmission antenna 2b (transmission antenna B in the figure) mounted on the vehicle.
- the request signal (ID request signal) is transmitted.
- the wire harness between the vehicle-mounted device 10 and the transmission antenna A provided on the driver's seat side of the vehicle is connected to the transmission antenna 2b provided on the vehicle-mounted device 10 and the passenger seat side of the vehicle (transmission antenna B in the figure). If the radio wave leaking from the wire harness between the two is picked up, the leaked radio wave is sent out from the transmission antenna A provided on the driver's seat side of the vehicle, as shown in the left part of FIG.
- a transmission antenna 2a (transmission) other than the transmission antenna 2b (transmission antenna B) that sends a request signal to a portable device that exists in an irregular area around the vehicle.
- the determination signal (burst signal) as shown in FIG. 2 is transmitted from the antenna A) (S102).
- the portable device-side control unit 26 determines whether or not this determination signal has been received (S200).
- the determination in S200 is NO, and the determination in S200 is repeated.
- the determination in S200 is YES, and then the RSSI of the determination signal is specified (S202).
- the RSSI of the determination signal can be specified by measuring the received signal strength during the RSSI burst “ON” period of the determination signal by the RSSI measurement unit 22a.
- a response signal is generated (S204). Specifically, a response signal that responds to the request signal is generated so as to include received signal strength information that represents the received signal strength of the determination signal.
- the generated response signal is sent to the vehicle-mounted device 10 (S206), and this process is terminated.
- the vehicle-mounted device 10 determines whether or not this response signal has been received (S104).
- the determination in S104 is NO, and the unlocking of the vehicle door is prohibited assuming that the portable device 20 is not in the regular area (S106).
- the determination in S104 is YES, and then measured by the portable device 20 during the RSSI burst “ON” period of the burst signal based on the RSSI “ON” included in the response signal. It is then determined whether the received signal strength is greater than a predetermined value (S108).
- the portable device 20 exists in a regular area such as the communication area of the transmission antenna B shown in the left part of FIG. 4, and the reception measured by the portable device 20 during the RSSI burst “ON” period of the burst signal.
- the determination in S108 is NO, and the vehicle door is unlocked assuming that the portable device 20 is in the regular area (S110).
- the portable device 20 exists in a non-regular area such as the communication area of the transmission antenna A shown in the left part of FIG. 4, and the reception measured by the portable device 20 during the RSSI burst “ON” period of the burst signal. If the signal strength is greater than a predetermined value, the determination in S108 is YES, and the unlocking of the vehicle door is prohibited assuming that the portable device 20 is in the non-regular area (S112). That is, even when a response signal in response to the request signal is transmitted from the portable device 20 existing in the non-regular area due to the leaked radio wave, the burst signal is transmitted based on the RSSI “ON” of the received signal strength information included in the response signal. When the received signal strength measured by the portable device 20 during the RSSI burst “ON” period becomes larger than a predetermined value, the vehicle door is unlocked assuming that the portable device 20 exists in the non-regular area. Is prohibited.
- the vehicle-mounted device causes the portable device existing in the regular area around the vehicle to send a request signal from the specific transmission antenna mounted on the vehicle and exists in the non-regular area around the vehicle.
- the portable device transmits a determination signal from another transmission antenna other than the specific transmission antenna that transmitted the request signal
- the portable device measures the received signal strength of the determination signal, and receives the request signal.
- a response signal is generated in response to the request signal so that the received signal strength information indicating the received signal strength of the determination signal is included, and the response signal is transmitted to the on-vehicle device. Whether the on-vehicle device has received the response signal or not.
- the mobile device controls the in-vehicle device as being present in the non-regular area. While shortening the time, it can be prevented that the portable device is erroneously detected as being present in the regular area even though the portable device is present in the non-regular area.
- the mobile device controls the in-vehicle device as being present in the regular area, so it is more accurate. In-vehicle equipment can be controlled.
- the portable device can start the determination signal according to the period after the request signal is transmitted.
- the position can be grasped, and the response time can be further shortened.
- the portable device receives the received signal strength and the low level in the high level period. It is possible to measure the received signal strength of each period.
- the regular area is, for example, a touch operation when a sensor that detects a touch operation on a door for unlocking a vehicle door detects a touch operation on one of a plurality of doors of the vehicle.
- the non-regular area refers to, for example, a predetermined area around a door other than the one door that is touched among the plurality of doors.
- the specific transmission antenna refers to, for example, a transmission antenna corresponding to the touch-operated one door, for example, a transmission antenna located in the vicinity of the touch-operated one door.
- the transmission antenna other than the specific transmission antenna refers to, for example, a transmission antenna for a door other than the touch-operated door, for example, an antenna located near a door other than the touch-operated door.
- the configuration of the in-vehicle device control system according to the second embodiment of the present disclosure is the same as that shown in FIG.
- a flowchart of the vehicle-side control unit according to the present embodiment is shown in FIG.
- the in-vehicle device control system according to the present embodiment is different from the flowchart of the vehicle side control unit according to the first embodiment shown in FIG. 3 in that steps S109 and S114 are added.
- the processing of the vehicle side control unit 13 is different.
- the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
- different points will be mainly described.
- the vehicle-side control unit 13 receives the measurement measured by the portable device 20 during the RSSI burst “ON” period of the burst signal based on the RSSI “ON” included in the response signal in S108. It is determined whether the signal strength is greater than a predetermined value.
- the determination in S108 is YES, and then, based on the RSSI “OFF” included in the response signal, during the RSSI burst “OFF” period of the burst signal. It is determined whether or not the received signal strength measured by the portable device 20 is greater than a predetermined value (S109). That is, based on RSSI “OFF” included in the response signal, it is determined whether or not the noise level around the vehicle is greater than a specified value.
- the determination in S109 is YES, and the burst signal output level is changed to be large (S114). ), Return to S100. Thereby, the determination signal (burst signal) is output at a larger output level next time in S104.
- the determination in S109 is NO, and the unlocking of the vehicle door is prohibited assuming that the portable device 20 is in the non-regular area (S112). That is, even when a response signal in response to the request signal is transmitted from the portable device 20 existing in the non-regular area due to the leaked radio wave, the burst signal is transmitted based on the RSSI “ON” of the received signal strength information included in the response signal.
- the received signal strength measured by the portable device 20 during the RSSI burst “ON” period is greater than a predetermined value, and the burst is determined based on the RSSI “OFF” of the received signal strength information included in the response signal.
- the received signal strength measured by the portable device 20 during the RSSI burst “OFF” period of the signal is equal to or less than a predetermined value, it is assumed that the portable device 20 exists in the non-regular area. Unlocking is prohibited.
- the portable device separately measures the received signal strength of the determination signal during the high level period and the low level period, and receives the received signal strength information indicating the received signal strength of the determination signal during the high level period;
- a response signal that responds to the request signal is generated so as to include received signal strength information that represents the received signal strength in the low level period, and the in-vehicle device receives received signal strength information that represents the received signal strength in the low level period of the determination signal.
- the portable device in the regular area Instructs the portable device in the regular area to send a judgment signal, so whether or not the portable device is in the non-regular area even if the noise level around the vehicle is large. It is possible to determine the.
- a radio wave having a high transmission level when transmitted around the vehicle, it may be an interference wave with respect to surrounding vehicles.
- the received signal strength in the low level period of the determination signal is represented.
- the transmission level is increased and a determination signal is sent to the portable device existing in the non-regular area around the vehicle. Therefore, the transmission level of the initial determination signal can be suppressed, and the influence on the surrounding vehicles due to the transmission of the determination signal can be suppressed.
- the request signal is transmitted from the LF transmitting antenna 2a provided in the center pillar on the driver's seat side and the LF transmitting antenna 2b provided in the center pillar on the passenger seat side.
- the present invention is not limited to such a configuration. It is good also as a structure provided with LF transmission antenna in the. In such a case, after sending a request signal from a specific transmission antenna mounted on the vehicle to a portable device existing in a regular area around the vehicle, the portable device existing in a non-regular area around the vehicle.
- the determination signal is sequentially transmitted from transmission antennas other than the specific transmission antenna that transmitted the request signal, and the portable device measures the reception signal strength of the determination signal transmitted sequentially, and the reception signal strength of the determination signal.
- a response signal that responds to the request signal may be generated so as to include received signal strength information that represents the response signal, and the response signal may be sent to the vehicle-mounted device.
- the determination signal is transmitted after a predetermined period has elapsed since the request signal is transmitted.
- the timing for transmitting the determination signal is as follows. It is not limited to such timing.
- the vehicle-mounted device compares the received signal strength measured by the RSSI measurement unit 22a with the specified value in the RSSI burst “ON” period of the burst signal in S108. As shown, the received signal strength measured by the RSSI measuring unit 22a during the RSSI burst “ON” period of the burst signal and the received signal strength measured by the RSSI measuring unit 22a during the RSSI burst “OFF” period of the burst signal. You may comprise so that a difference may be compared with a regulation value.
- the vehicle-side control unit 13 that executes S100 can correspond to an example of a request signal transmission unit and means.
- the vehicle-side control unit 13 that executes S102 can correspond to an example of a determination signal sending unit and means.
- the RSSI measuring unit 22a can correspond to an example of a received signal strength measuring unit and means.
- the portable device side control unit 26 that executes S204 and S206 can correspond to an example of a response signal transmission unit and means.
- the vehicle-side control unit 13 that executes S104 can correspond to an example of a reception determination unit and means.
- the vehicle-side control unit 13 that executes S108 can correspond to an example of a reception intensity determination unit and means.
- the vehicle side control part 13 which performs S112 and S110 can correspond to an example of a vehicle-mounted apparatus control part and a means.
- the vehicle-side control unit 13 that executes S109 can correspond to an example of a noise level determination unit.
- the vehicle-side control unit 13 that executes S114 can correspond to an example of a transmission level change instruction unit and means.
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Abstract
Description
本開示の第1実施形態に係る車載機器制御システムの構成を図1に示す。本車載機器制御システムは、利用者が所持する携帯機20と、当該携帯機20との通信により携帯機20が正規エリアに存在するか否かを判定し、当該判定結果に応じた車載機器の制御を行う車載器10により構成されている。この車載機器制御システムは、車両のドアの解錠および車両駆動装置(例えばエンジン)の始動を行うものである。
memory)、ROM(read only memory)、I/O(input/output)等を備えたマイクロコンピュータとして実現されており、CPUがROMに記録されたプログラムを実行することで、RAMを作業領域として種々の処理を実現する。以下では、CPUが実行する処理を、車両側制御部13の処理として記載する。
本開示の第2実施形態に係る車載機器制御システムの構成は図1に示したものと同じである。本実施形態に係る車両側制御部のフローチャートを図6に示す。本実施形態に係る車載機器制御システムは、図3に示した第1実施形態に係る車両側制御部のフローチャートに対し、S109、S114のステップを追加した点が異なる。車両側制御部13の処理が異なる。なお、上記第1実施形態と同一部分については同一符号を付して説明を省略し、以下、異なる点を中心に説明する。
上記第1、第2実施形態では、運転席側のセンターピラー内等に備えられたLF送信アンテナ2aと、助手席側のセンターピラー内等に備えられたLF送信アンテナ2bからリクエスト信号を送出する例を示したが、このような構成に限定されるものではなく、例えば、トランク外、運転席側の車両前方、運転席側の車両後方、助手席側の車両前方、助手席側の車両後方等にLF送信アンテナを備えた構成としてもよい。このような場合、車両周囲の正規エリアに存在する携帯機に対して、車両に搭載された特定の送信アンテナよりリクエスト信号を送出させた後、車両周囲の非正規エリアに存在する携帯機に対して、リクエスト信号を送出した特定の送信アンテナ以外の送信アンテナより順次判定用信号を送出させ、携帯機は、順次送信される判定用信号の受信信号強度を測定し、判定用信号の受信信号強度を表す受信信号強度情報を含むように、リクエスト信号に応答するレスポンス信号を生成し、当該レスポンス信号を車載器へ送出するように構成すればよい。
Claims (6)
- 利用者が所持する携帯機(20)と、
当該携帯機(20)との通信により前記携帯機(20)が正規エリアに存在するか否かを判定し、当該判定結果に応じた車載機器の制御を行う車載器(10)と、を備える車載機器制御システムであって、
前記車載器(10)は、
車両周囲の正規エリアに存在する携帯機(20)に対して、車両に搭載された特定の送信アンテナよりリクエスト信号を送出させるリクエスト信号送出部(S100)と、
車両周囲の非正規エリアに存在する携帯機(20)に対して、前記リクエスト信号を送出した前記特定の送信アンテナ以外の他の送信アンテナより判定用信号を送出させる判定用信号送出部(S102)と、を備え、
前記携帯機(20)は、
前記判定用信号の受信信号強度を測定する受信信号強度測定部(22a)と、
前記リクエスト信号を受信すると、前記判定用信号の受信信号強度を表す受信信号強度情報を含むように、前記リクエスト信号に応答するレスポンス信号を生成し、当該レスポンス信号を前記車載器(10)へ送出するレスポンス信号送出部(S204、S206)と、を備え、
前記車載器(10)は、
前記レスポンス信号を受信したか否かを判定する受信判定部(S104)と、
前記レスポンス信号に含まれる前記受信信号強度情報に基づいて前記判定用信号の受信強度が規定値よりも大きいか否かを判定する受信強度判定部(S108)と、
前記受信判定部(S104)により前記レスポンス信号を受信したと判定された場合でも、前記受信強度判定部(S108)により前記判定用信号の受信強度が規定値よりも大きいと判定された場合、前記携帯機(20)が非正規エリアに存在するものとして前記車載機器の制御を行う車載機器制御部(S110、S112)と、を備える車載機器制御システム。 - 前記車載機器制御部(S110、S112)は、前記受信判定部(S104)により前記レスポンス信号を受信したと判定され、かつ、前記受信強度判定部(S108)により前記判定用信号の受信強度が規定値以下と判定された場合、前記携帯機(20)が正規エリアに存在するものとして前記車載機器の制御を行う請求項1に記載の車載機器制御システム。
- 前記判定用信号は、一定期間ハイレベルが連続するハイレベル期間と一定期間ローレベルが連続するローレベル期間を有する信号となっている請求項1または2に記載の車載機器制御システム。
- 前記受信信号強度測定部(S108)は、前記判定用信号のハイレベル期間とローレベル期間の受信信号強度を別々に測定し、
前記レスポンス信号送出部(S204、S206)は、前記判定用信号のハイレベル期間の受信信号強度を表す受信信号強度情報とローレベル期間の受信信号強度を表す受信信号強度情報を含むように、前記リクエスト信号に応答するレスポンス信号を生成し、
前記車載器(10)は、
前記判定用信号のローレベル期間の受信信号強度を表す受信信号強度情報に基づいて車両周囲の雑音レベルが規定値よりも大きいか否かを判定する雑音レベル判定部(S109)と、
前記雑音レベル判定部(S109)により前記車両周囲の雑音レベルが規定値よりも大きいと判定された場合、前記判定用信号送出部(S102)に、より送信レベルを大きくして、前記車両周囲の非正規エリアに存在する携帯機(20)に対し、前記判定用信号を送出するように指示する送信レベル変更指示部(S114)と、を備える請求項3に記載の車載機器制御システム。 - 前記判定用信号送出部(S102)は、前記リクエスト信号送出部(S100)により前記リクエスト信号が送出されてから予め定められた期間が経過した後、前記判定用信号を送出させる請求項1ないし4のいずれか1つに記載の車載機器制御システム。
- 前記車載器(10)は、車両ドア解錠のためのドアへのタッチ操作を検出するセンサ(6)と通信可能に接続されており、
前記センサ(6)により複数のドアのうち一のドアへのタッチ操作を検出されると、前記車載器(10)は、
前記タッチ操作された一のドアの周辺の所定領域である正規エリアに対して、該タッチ操作された一のドア近傍に位置する前記特定のアンテナより前記判定用信号を送出せずに前記リクエスト信号を送出させるとともに、
前記複数のドアのうちタッチ操作された一のドア以外のドアの周辺の所定領域である非正規エリアに対して、該タッチ操作された一のドア以外のドア近傍に位置する前記他の送信アンテナより前記リクエスト信号を送出せずに前記判定用信号を送出させ、
前記受信判定部(S104)により前記レスポンス信号を受信したと判定された場合でも、前記受信強度判定部(S108)により前記判定用信号の受信強度が規定値よりも大きいと判定された場合、前記複数のドアのうちタッチ操作された一のドア以外のドアの周辺の所定領域である非正規エリアに前記携帯機(20)が存在するものとして前記車載機器の制御を行い、
前記車載機器制御部(S110、S112)は、前記受信判定部(S104)により前記レスポンス信号を受信したと判定され、かつ、前記受信強度判定部(S108)により前記判定用信号の受信強度が規定値以下と判定された場合、前記タッチ操作された一のドアの周辺の所定領域である正規エリアに前記携帯機(20)が存在するものとして前記車載機器の制御を行う
請求項1ないし5のいずれか1つに記載の車載機器制御システム。
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